Damage Condition Possible Causes Countermeasures

Dull or cloudy spots appear on surface along with light Wear. From such dull spots, tiny Cracks are generated downward to a depth of 5-10 ｵm. Small particles fall off and minor Flaking occurs widely.

Unsuitable lubricant
Entry of debris into lubrication
Rough surface due to poor lubrication
Surface roughness of mating rolling parts
  • Select a proper lubricant
  • Improve the sealing mechanism
  • Improve the surface finish of the rolling mating parts

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Peeling 1

Peeling 1

Part : Inner ring of a spherical roller bearing
Symptom : Rounded areas of Peeling
Cause : Poor lubrication

Peeling 2

Peeling 2

Part : Enlargement of damage "PEELING 1"


Peeling 3

Peeling 3

Part : Convex rollers of damage "PEELING 1"
Symptom : Rounded areas of Peeling on the center of the rolling surfaces
Cause : Poor lubrication

Peeling 4

Peeling 4

Part : Outer ring of a spherical roller bearing
Symptom : Peeling occurs near the shoulder of the raceway over the entire circumference
Cause : Poor lubrication



Motion & Control